Home / 1,279,020.51-1,918,720.31-425,813.49

Finding the Fourth Proportional to 1,279,020.51, 1,918,720.31 and 425,813.49

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Solution

The fourth proportional to 1,279,020.51, 1,918,720.31 and 425,813.49 is: 638,783.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,020.51 : 1,918,720.31 = 425,813.49 : x
  2. Step 2: Convert to fraction form
    1,279,020.51/1,918,720.31 = 425,813.49/x
  3. Step 3: Cross multiply
    1,279,020.51x = 1,918,720.31 × 425,813.49
  4. Step 4: Simplify right side
    1,279,020.51x = 817,016,989,405.91
  5. Step 5: Solve for x
    x = 817,016,989,405.91/1,279,020.51
  6. Step 6: Final answer
    x = 638,783.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.